If a triggered event is let through by the XIVE virtualization routing engine, the Event Queue data defined in the associated IVE is pushed in the in-memory event queue. The latter is a circular buffer provided by the OS using the H_INT_SET_QUEUE_CONFIG hcall, one per server and priority couple. Each Event Queue entry is 4 bytes long, the first bit being a 'generation' bit and the 31 following bits the EQ Data field.
The EQ Data field provides a way to set an invariant logical event source number for an IRQ. It is set with the H_INT_SET_SOURCE_CONFIG hcall when the EISN flag is used. Signed-off-by: Cédric Le Goater <c...@kaod.org> --- Changes since v1: - replaced dma_memory_write() by stl_be_dma() - improved 'info pic' output hw/intc/spapr_xive.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 95 insertions(+), 3 deletions(-) diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c index 8e990d58ecf4..629563d01998 100644 --- a/hw/intc/spapr_xive.c +++ b/hw/intc/spapr_xive.c @@ -196,9 +196,87 @@ static sPAPRXiveNVT *spapr_xive_nvt_get(sPAPRXive *xive, int server) return cpu ? SPAPR_XIVE_NVT(cpu->intc) : NULL; } +static void spapr_xive_pic_print_info_eq(XiveEQ *eq, Monitor *mon) +{ + uint64_t qaddr_base = (((uint64_t)(eq->w2 & 0x0fffffff)) << 32) | eq->w3; + uint32_t qindex = GETFIELD(EQ_W1_PAGE_OFF, eq->w1); + uint32_t qgen = GETFIELD(EQ_W1_GENERATION, eq->w1); + uint32_t qsize = GETFIELD(EQ_W0_QSIZE, eq->w0); + uint32_t qentries = 1 << (qsize + 10); + + monitor_printf(mon, "eq:@%08" PRIx64"% 6d/%5d ^%d", qaddr_base, + qindex, qentries, qgen); +} + +static void spapr_xive_eq_push(XiveEQ *eq, uint32_t data) +{ + uint64_t qaddr_base = (((uint64_t)(eq->w2 & 0x0fffffff)) << 32) | eq->w3; + uint32_t qsize = GETFIELD(EQ_W0_QSIZE, eq->w0); + uint32_t qindex = GETFIELD(EQ_W1_PAGE_OFF, eq->w1); + uint32_t qgen = GETFIELD(EQ_W1_GENERATION, eq->w1); + + uint64_t qaddr = qaddr_base + (qindex << 2); + uint32_t qdata = (qgen << 31) | (data & 0x7fffffff); + uint32_t qentries = 1 << (qsize + 10); + + if (stl_be_dma(&address_space_memory, qaddr, qdata)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to write EQ data @0x%" + HWADDR_PRIx "\n", qaddr); + return; + } + + qindex = (qindex + 1) % qentries; + if (qindex == 0) { + qgen ^= 1; + eq->w1 = SETFIELD(EQ_W1_GENERATION, eq->w1, qgen); + } + eq->w1 = SETFIELD(EQ_W1_PAGE_OFF, eq->w1, qindex); +} + static void spapr_xive_irq(sPAPRXive *xive, int lisn) { + XiveIVE *ive; + XiveEQ *eq; + uint32_t eq_idx; + uint8_t priority; + + ive = spapr_xive_get_ive(xive, lisn); + if (!ive || !(ive->w & IVE_VALID)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid LISN %d\n", lisn); + return; + } + if (ive->w & IVE_MASKED) { + return; + } + + /* Find our XiveEQ */ + eq_idx = GETFIELD(IVE_EQ_INDEX, ive->w); + eq = spapr_xive_get_eq(xive, XIVE_EQ_INDEX_SERVER(eq_idx), + XIVE_EQ_INDEX_PRIO(eq_idx)); + if (!eq) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No EQ for LISN %d\n", lisn); + return; + } + + if (eq->w0 & EQ_W0_ENQUEUE) { + spapr_xive_eq_push(eq, GETFIELD(IVE_EQ_DATA, ive->w)); + } + + if (!(eq->w0 & EQ_W0_UCOND_NOTIFY)) { + qemu_log_mask(LOG_UNIMP, "XIVE: !UCOND_NOTIFY not implemented\n"); + } + + if (GETFIELD(EQ_W6_FORMAT_BIT, eq->w6) == 0) { + priority = GETFIELD(EQ_W7_F0_PRIORITY, eq->w7); + + /* The EQ is masked. Can this happen ? */ + if (priority == 0xff) { + g_assert_not_reached(); + } + } else { + qemu_log_mask(LOG_UNIMP, "XIVE: w7 format1 not implemented\n"); + } } /* @@ -480,14 +558,28 @@ void spapr_xive_pic_print_info(sPAPRXive *xive, Monitor *mon) pq = spapr_xive_pq_get(xive, i); eq_idx = GETFIELD(IVE_EQ_INDEX, ive->w); - monitor_printf(mon, " %4x %s %s %c%c server:%d prio:%d %08x\n", i, + monitor_printf(mon, " %4x %s %s %c%c server:%d prio:%d ", i, spapr_xive_irq_is_lsi(xive, i) ? "LSI" : "MSI", ive->w & IVE_MASKED ? "M" : " ", pq & XIVE_ESB_VAL_P ? 'P' : '-', pq & XIVE_ESB_VAL_Q ? 'Q' : '-', XIVE_EQ_INDEX_SERVER(eq_idx), - XIVE_EQ_INDEX_PRIO(eq_idx), - (int) GETFIELD(IVE_EQ_DATA, ive->w)); + XIVE_EQ_INDEX_PRIO(eq_idx)); + + if (!(ive->w & IVE_MASKED)) { + XiveEQ *eq; + + eq = spapr_xive_get_eq(xive, XIVE_EQ_INDEX_SERVER(eq_idx), + XIVE_EQ_INDEX_PRIO(eq_idx)); + if (eq) { + spapr_xive_pic_print_info_eq(eq, mon); + monitor_printf(mon, " data:%08x", + (int) GETFIELD(IVE_EQ_DATA, ive->w)); + } else { + monitor_printf(mon, "no eq ?!"); + } + } + monitor_printf(mon, "\n"); } } -- 2.13.6